This book has been highly recommended for some of the most experienced people I know in the computer graphics and animation world.
Richard Williams, the author, is an Oscar winner animator, director and producer who has spent much of his career at Disney Animation. The book deals about various aspects of animation, including techniques, advices, tips, tricks and history of animation. It also has a small preview on Youtube about all the materials available at the official web page: theanimatorssurvivalkit.com
I hope you find this useful and if you have any question or recommendation you can leave a comment or send me an email through the contact page.